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    VENTS NKP A21 V.2 series

    VENTS NKP A21 V.2 series
    VENTS NKP A21 V.2 series
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    Heater for heat exchanger freeze protection
    Model features
    • For round ducts
    • Ventilation accessories
    Series of products
    VENTS NKP 125-0,6-1 A21 V.2
    VENTS NKP 125-0,6-1 A21 V.2
    VENTS NKP 125-0,8-1 A21 V.2
    VENTS NKP 125-0,8-1 A21 V.2
    VENTS NKP 125-1,2-1 A21 V.2
    VENTS NKP 125-1,2-1 A21 V.2
    VENTS NKP 150-0,8-1 A21 V.2
    VENTS NKP 150-0,8-1 A21 V.2
    VENTS NKP 150-1,2-1 A21 V.2
    VENTS NKP 150-1,2-1 A21 V.2
    VENTS NKP 150-1,7-1 A21 V.2
    VENTS NKP 150-1,7-1 A21 V.2
    VENTS NKP 150-2,0-1 A21 V.2
    VENTS NKP 150-2,0-1 A21 V.2
    VENTS NKP 160-0,8-1 A21 V.2
    VENTS NKP 160-0,8-1 A21 V.2
    VENTS NKP 160-1,2-1 A21 V.2
    VENTS NKP 160-1,2-1 A21 V.2
    VENTS NKP 160-1,7-1 A21 V.2
    VENTS NKP 160-1,7-1 A21 V.2
    VENTS NKP 160-2,0-1 A21 V.2
    VENTS NKP 160-2,0-1 A21 V.2
    VENTS NKP 200-1,2-1 A21 V.2
    VENTS NKP 200-1,2-1 A21 V.2
    VENTS NKP 200-1,7-1 A21 V.2
    VENTS NKP 200-1,7-1 A21 V.2
    VENTS NKP 200-2,0-1 A21 V.2
    VENTS NKP 200-2,0-1 A21 V.2
    VENTS NKP 250-1,2-1 A21 V.2
    VENTS NKP 250-1,2-1 A21 V.2
    VENTS NKP 250-2,0-1 A21 V.2
    VENTS NKP 250-2,0-1 A21 V.2
    VENTS NKP 250-3,0-1 A21 V.2
    VENTS NKP 250-3,0-1 A21 V.2
    VENTS NKP 315-2,0-1 A21 V.2
    VENTS NKP 315-2,0-1 A21 V.2
    VENTS NKP 315-3,0-1 A21 V.2
    VENTS NKP 315-3,0-1 A21 V.2
    • Description
    • Modifications
    • Downloads
    • Designation key
    • Compatibility table
    • Electric heater power selection diagram
    Description
    Description
    APPLICATION  
    • Duct electric heater for heat exchanger freeze protection by means of supply air preheating and supply air duct temperature maintaining at a point that ensures heat exchanger freezing protection.
    • Compatible with round Ø125, 150, 160, 200, 250 and 315 mm air ducts.
    DESIGN  
    • The casing and the control box are made of galvanized steel and the heating elements are made of stainless steel.
    • The heater casing is extra heat insulated with 20 mm non-flammable mineral wool layer.
    • The heater spigots are rubber sealed for airtight connection to the air ducts.
    • The NKP A21 V.2 duct heaters are equipped with a power cable and a control cable for connection to a controller of an air handling unit.
    • Air temperature is controlled with a triac power controller that switches the maximum load on/off.
    • Load is commutated with a semiconductor (triac).
    • The heaters are equipped with overheat protection thermostats:
      ⏵self-resetting overheat protection thermostat actuated at +60 °C.
      ⏵emergency overheat protection thermostat actuated at +90 °C.
    MOUNTING  
    • The heater design ensures its connection to round air ducts by means of the clamps from the delivery set.
    • The arrow on the heater casing must match the air flow direction in the system.
    • The heater is controlled by the ventilation unit through the cable supplied and already connected to the heater at the factory.
    • The control box cover must be directed upwards with the maximum deviation angle 90°.
    • The control box cover must not be directed downwards.
    Modifications
    Modification name
    NKP 250-3,0-1 A21 V.2
    NKP 125-0,6-1 A21 V.2
    NKP 200-2,0-1 A21 V.2
    NKP 160-2,0-1 A21 V.2
    NKP 160-0,8-1 A21 V.2
    NKP 150-1,2-1 A21 V.2
    NKP 315-2,0-1 A21 V.2
    NKP 125-0,8-1 A21 V.2
    NKP 250-1,2-1 A21 V.2
    NKP 200-1,2-1 A21 V.2
    NKP 160-1,2-1 A21 V.2
    NKP 150-1,7-1 A21 V.2
    NKP 315-3,0-1 A21 V.2
    NKP 125-1,2-1 A21 V.2
    NKP 250-2,0-1 A21 V.2
    NKP 200-1,7-1 A21 V.2
    NKP 160-1,7-1 A21 V.2
    NKP 150-2,0-1 A21 V.2
    NKP 150-0,8-1 A21 V.2
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    Downloads
    Downloads
    Select document type
    • Advertising and printing products
    • Certificates
    • Technical documentation
    Name
    Download
    Show
    "NKP A21 V.2" product description 10-2021 (pdf 473.53Kb)
    "NKP A21 V.2" user's manual 09-2021 (V249EN-01) (pdf 1.37Mb)
    Download high quality image "NKP A21 V.2" (psd 2.26Mb)
    Download image "NKP A21 V.2" for your website (png 477.82Kb)
    Designation key
    Designation key
    Series Connected air duct diameter [mm] - Heater power, kW - Phase Options
    NKP 125; 150; 160; 200; 250; 315 0.6; 0.8; 1.2; 1.7; 2.0; 3.0 1: single-phase А21 V.2: compatible with А21 automation, without a DB-9M connector
    Compatibility table
    Compatibility table
    Heater model (connected air duct diameter)  
    NKP 125 А21 V.2 VUT/VUE VB EC A21
    NKP 150 А21 V.2 VUT/VUE VB EC A21
    NKP 160 А21 V.2 VUT/VUE VB EC A21
    NKP 200 А21 V.2 VUT/VUE VB EC A21
    NKP 250 А21 V.2 VUT/VUE VB EC A21
    NKP 315 А21 V.2 AirVents with a 315 mm spigot and an A21 automation
    Electric heater power selection diagram
    Electric heater power selection diagram

    How to use electric heater diagrams

    • Selection of the NKP A21 V.2 heater model compatible with VUT 350 VB EC A21 air handling unit. The rated winter outside air temperature is -15 °С. The rated air flow is 220 m³/h. Starting from the rated winter outside air temperature (1) draw a horizontal line till the air flow axis (2). The NKP A21 V.2 heater with heating capacity 1200 W is able to provide efficient heat exchanger freeze protection.
    • The NKP 160-1,2-1 A21 V.2 with the diameter matching the spigot diameter of the VUT 350 VB EC A21 air handling unit is a suitable model.
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